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On those old women's watches the balance staff is easily damaged or the hair spring could become easily bent. Other than that there are enough of them made that you could probably still buy a few and scavenge parts until you get it working. Problem with those watches was they had no shock resistance and the cases were barely made to keep dust out.
some watch dials require you to back out tiny screws that are accessible from the sides. Also, removing the hands first with a hand pulling tool would help if you were actually repairing the watch. Nothing too difficult about watch repair, just getting parts is a hassle as most of the parts are not available to be purchased by third parties.